Means for preserving wooden posts and poles from decay.



R. E. HELLMUND.

COMMUTATOR CYLINDER FOR DYNAMO ELECTRIC MACHlNES.

APPLICATION FILED sEPT.2?, 1916.

1,293,770. Patented Feb. 11, 1919 WITNESSES: INVENTOR BY ATTORNEY 1 Noam: nuns ca. PHONLIYMQ. wunmcmm fiuao/ff. He 1 lmund.

a era nLms H. HERSHEY, or LANCASTER, PENNSYLVANIA.

MEFJIS FOR PRESERVING WOODEN POSTS AND POLES FROM DECAY.

Specification of Letters Patent.

Patented Feb. ii. rain.

' Application filed February 14, 1918. Serial No. 217,074.

provide an annular space or chamber for preservative fluid in the casing which surrounds as usual the butt of the post, said chamber being preferably divided into compartments by vertical ribs so that the post will t tightly on all sides against said ribs, yet be in contact on all sides with the said preservative iiuid. I also provide for shielding this space or chamber against the intrusion of rain or other moisture or foreign matter from above by fitting an annular cap over said chamber and into an annular groove of the, post or pole; and provide the latter with holes for the reception of said fluid from said chamber and with other holes or channels and means of liquid supply whereby such liquid may be directed into said eha1nher without removing said cap and from a point or points above the latter. The ribs aforesaid are also provided with transverse perforations to allow said liquid to flow from one compartment of said chamber into another, thus keeping, up the supply of the entire clnnnber. Furthermore the produelieu of said chamber and ribs in casting said chamber of concrete is preferably effected by fastening detachable vertical strips lo the lowcr part of the pole with slight intervals bctwccn thcn before casting, the inl'crvals providing the ribs and the strips providing [he alternating compartments, said strips being removed after casting. and the means of attaching the strips being used for supporting the capping.

in the accompanying drawings Figure l oprcscuts a vertical section partly in elevation of the lower part of a pole or post and its ising;

L--2 of Fig. 1;

Fig. 3 represents a detail elevation of the lower part of the pole, showing its groove and holes with casing and cap in section;

I may be employed.

Fig. 2 reprcscuts a cross section on the line.

Fig. l represents an enlarged detail view of two of the ribs of the casing, showing the perforations distinctly;

Fig. 5 represents a view of the pole similar to that in Fig. 3 but with the strips attached,

before casting the casing. I

A designates a pole or post, B, its cement or concrete casing, C, an annular space or chamber in the inner face of said chamber. surrounding the post, so that any preservative liquid or semi-liquid contained therein will be in contact with said pole. This chamber is approximately on the groundv level 0, but extends more or less above and below the latter. It is divided into conipartments by vertical ribs D, which contact with the pole or post on all sides of it, making a tight joint and bracing it everywhere, though permitting access of the preservative liquid, to said pole on all sides thereof. Each rib is transversely perforated at (Z, so that the fluid will flow from compartment to compartment, filling the entire chamber as also over the tops of the ribs.

Holes (1- are bored into the sides of the post, for admission of such liquid into its interior from said chamber. The upper end or top of the, chamber is shielded against rain, snow or any other foreign matter by an annular waterproof cap F which fits into an annular groove G of the said post and has soft packing f under it in contact with the top v of the casing and securely fitting the upper cud of said chamber. Liquid may be supplied to said clnunbcr. without removing said cap, by means of oneor more tubes or liquid containers ll. communicating with inclined and bent channels I in said pole. having their uppcr cnds above said cap and at iho cXlcrio of so id polo whereas their lower cnds urc lulmv said cap and discharge into said chambcr. The said tubes cups or contuincrs ll. may be screwed into the upper cnds of said channcls or attached in any other wa v. Said tubcs ma be of an convcuient form. Any form of such article The rcadiest way to make the chamber 0 divided by ribs D is to removablv attach strips K Fig. 5. to the corresponding part of the pole, cast the cement casing on this part of the pole thus provided and withdraw said strips after the cement hardens. Each strip will thus leave one of the compartmentsof thecha'mber C behind it andthe intervening said V-ring, of an insulating member located ithin the annulus formed by the projecting portions of saidsegments, said 1nsulating member having an inwardly "pr0-- jecting flangeto provide a comparatively long 'creepage path between said segments and said 'V-i'ing.

3'. In a commutator cylinder, the combination with {conducting and 'insulating'seg m ents and 'a supporting V-ring therefor, the

said segmentsprojecting beyond the end of said V ring, of an insulating"member located Within the annulus formed by the projecting portions of said segments and having a-n iiivvardly projecting 'fiang'e spaced fron 'saiclV-ring. j

I 4, In "a commutator cylinder, 'the'comb'ination with conducting and insulating'se'gments and a supporting V-ring therefor, the said segments projecting beyond the end of said V-ring, of an insulating meinberseoured to'the face of said V-ri-ng and having a portion thereof projecting inwardly beyond the inner surface of said V-rlng. V 5. "In a commutator .cyllnder, the combnation W1th conducting and insulating segments, of a cylindrical supportingstructure therefor, said segments projecting beyond the end of saidsupporting structure, and an insulating member located Within the annulus formed by the projecting portions of said seginents,said insulating member having a tapering portion adapted to exert a 'we'dging force againstsaidsegments, and

also having an inwardly projecting flange that isspacecl from the remainder of the commutator structure and that provides an extended 'cr'eepage path between said segments and said supporting structure.

"in testimonyywhereo'f, I'liave hereunto subscribed 1916. 7

y thisLZQnd day of Sept,

RUDOLF E E LM i s vthis ratiit y be o ained for five cents "a'mty eaarsssiir the c'ommissm erimm n wa'shington, n. c. 

